C# DataContractJsonSerializer的InvalidCastException
我正在尝试使用C# DataContractJsonSerializer的InvalidCastException,c#,.net,json,windows-phone-7,C#,.net,Json,Windows Phone 7,我正在尝试使用DataContractJsonSerializer阅读一些JSON,就像我通常做的那样 有效JSON如下所示: { "error": "false", "errorMsg": "Error message", "errorField": "", "time": "19:24", "times": [ [ "blank", "19:35", "London", "direct", "1",
DataContractJsonSerializer
阅读一些JSON,就像我通常做的那样
有效JSON如下所示:
{
"error": "false",
"errorMsg": "Error message",
"errorField": "",
"time": "19:24",
"times": [
[
"blank",
"19:35",
"London",
"direct",
"1",
"new"
],
[
"blank",
"20:07",
"Manchester",
"direct",
"1",
"old"
]
],
"buses": [],
"ferries": [],
"updates": []
}
#
数据类:
[DataContract]
public class NRResult
{
[DataMember(Name = "times")]
public IEnumerable<Timings> Timings{ get; set; }
}
[DataContract]
public class Timings {
[DataMember]
public string unknown1 { get; set; }
[DataMember]
public string time { get; set; }
[DataMember]
public string destination { get; set; }
[DataMember]
public string ontime { get; set; }
[DataMember]
public string unknown2 { get; set; }
[DataMember]
public string link { get; set; }
}
[DataContract]
公开课成绩
{
[DataMember(Name=“times”)]
公共IEnumerable计时{get;set;}
}
[数据合同]
公课上课时间{
[数据成员]
公共字符串未知1{get;set;}
[数据成员]
公共字符串时间{get;set;}
[数据成员]
公共字符串目标{get;set;}
[数据成员]
时间{get;set;}上的公共字符串
[数据成员]
公共字符串未知2{get;set;}
[数据成员]
公共字符串链接{get;set;}
}
我在第行得到一个无效的castedexception
var item=(nResult)序列化程序.ReadObject(流);
我不知道为什么?我认为
nresult
的声明应该是这样的
[DataContract]
public class NRResult
{
[DataMember(Name = "times")]
public IEnumerable<string[]> Timings { get; set; }
}
DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(NRResult));
using (var stream = new MemoryStream(Encoding.UTF8.GetBytes(result1)))
{
var item = (NRResult)serializer.ReadObject(stream);
foreach (var route in item.Timings)
{
var _item = new{
Route = route[0],
Time = route[1],
Destination = route[2],
AimedDepart = route[3],
ExpectedDepart = route[4],
OpRef = route[5]
};
Console.WriteLine(_item);
}
};
[DataContract]
公开课成绩
{
[DataMember(Name=“times”)]
公共IEnumerable计时{get;set;}
}
DataContractJsonSerializer serializer=新的DataContractJsonSerializer(typeof(nResult));
使用(var stream=newmemoryStream(Encoding.UTF8.GetBytes(result1)))
{
var item=(nResult)序列化程序.ReadObject(流);
foreach(项目中的var路由计时)
{
变量_项=新{
路由=路由[0],
时间=路线[1],
目的地=路线[2],
AimedDepart=路线[3],
ExpectedDepart=路线[4],
OpRef=路线[5]
};
控制台写入线(_项);
}
};
确保TFLBUSE和NRResult有一个没有参数的公共构造函数。很抱歉,TFLBUSE应该是“计时”。改变了。是的,就是这样。我看到这个JSON的格式与我以前使用的其他JSON不同,所以我不需要设置类中每个字段的名称,因为您已经将它们去掉了。
[DataContract]
public class NRResult
{
[DataMember(Name = "times")]
public IEnumerable<string[]> Timings { get; set; }
}
DataContractJsonSerializer serializer = new DataContractJsonSerializer(typeof(NRResult));
using (var stream = new MemoryStream(Encoding.UTF8.GetBytes(result1)))
{
var item = (NRResult)serializer.ReadObject(stream);
foreach (var route in item.Timings)
{
var _item = new{
Route = route[0],
Time = route[1],
Destination = route[2],
AimedDepart = route[3],
ExpectedDepart = route[4],
OpRef = route[5]
};
Console.WriteLine(_item);
}
};